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Behind the Black

Despite permanent repair of crack, air still leaking from Zvezda

20 Nov 2020, 17:11 UTC
Despite permanent repair of crack, air still leaking from Zvezda
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According to a Russian news report yesterday, air is still leaking from the Zvezda module of ISS, despite the permanent repair of the crack earlier this week.
Earlier, the crew locked the hatches into the intermediate chamber. The Mission Control asked whether the crew had measured the pressure before the hatch into that chamber was opened. The crew reported that the pressure went down considerably in the smaller part of the compartment while it remained isolated from the rest of the station by an airtight hatch. “The pressure in the intermediate chamber went down from 723 mm of the mercury column to 685 millimeters,” Ryzhikov said.
The report is poorly written, and is unclear on the exact date this air test was done. It is therefore possible the test was done prior to the permanent repair.
If however the air is still leaking, this suggests there might be more than one leak point in that part of Zvezda. According to this same story, the two Russian astronauts during their spacewalk on November 18th took pictures of the exterior area of Zvezda where the leak is located, and noted no exterior damage.
All these facts point to a very serious problem. ...

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